ISO 20318-1:2019
ISO 20318-1:2019 Mechanical pencils and leads for general use - Classification, dimensions, quality and test methods - Part 1: Mechanical pencils
standard by International Organization for Standardization, 03/01/2019
Full Description
This document specifies classification, dimensions, quality and test methods for hand-held mechanical pencilss which hold and feed out a lead, and are used for general writing. It is also applicable to multi-function pens equipped with a mechanical pencil unit. However, those pencils attached to machinery instruments such as a plotter are excluded.